The phrase "to crack a book" means to open a book to study or read, often implying the beginning of studying. The structure is a metaphor where "crack" means to open something, and "book" refers to study material. It is informal slang commonly used in academic contexts, sometimes with a mild implication that the studying may be minimal or just starting.

Визначення та значення слова « crack a book» англійською мовою

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